The active ingredient in Sildigra 100 mg is sildenafil citrate. Sildigra 100 mg is a medication used to treat erectile dysfunction (ED) in men. Sildenafil citrate is a phosphodiesterase type 5 (PDE5) inhibitor, and it works by increasing blood flow to the penis during sexual stimulation. This helps men with ED achieve and maintain an erection suitable for satisfactory sexual activity. As a PDE5 inhibitor, sildenafil citrate blocks the action of the enzyme PDE5, which normally breaks down a chemical called cyclic guanosine monophosphate (cGMP). By inhibiting PDE5, sildenafil allows cGMP to accumulate, leading to relaxation of the smooth muscles in the penile blood vessels. This relaxation allows for increased blood flow into the penis, resulting in an erection. It's important to note that Sildigra 100 mg and other medications containing sildenafil citrate should be taken only as prescribed by a healthcare professional. The dosage and usage instructions should be followed carefully, and it's essential to consult with a doctor before starting any new medication for the treatment of erectile dysfunction.